This was 6.6 percent higher than the state average of 44.8 percent. In 2020 the total municipality population reached 666.
96.1 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Portland for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 17 | 3.9 |
| Regular high school diploma | 103 | 23.4 |
| GED or alternative credential | 2 | 0.5 |
| Some college, less than 1 year | 16 | 3.6 |
| Some college, 1 or more years, no degree | 76 | 17.3 |
| Associate's degree | 75 | 17 |
| Bachelor's degree | 114 | 25.9 |
| Master's degree | 28 | 6.4 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 9 | 2 |
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